Smoothing derivatives of functions and applications

Differential Equations--Geometric Theory

Harry Pollard, Solomon Lefschetz · Mathematics of Computation · 1964 · 756 citations · Full text

Contributions to Stability Theory

J. L. Massera · Annals of Mathematics · 1956 · 478 citations

Natural Sciences, Mathematics, Physics +10

On Gradient Dynamical Systems

Stephen T. Smale · Annals of Mathematics · 1961 · 403 citations

Natural Sciences, Mathematics, Differential Equations +10

On combinatorial submanifolds of differentiable manifolds

Morris W. Hirsch · Commentarii Mathematici Helvetici · 1962 · 37 citations · Full text

Law, Mathematics, Copyright Law +6